This paper objectives are to; (i) identification of risky slopes (within 4 Provinces in Sumatra including Provinces of Riau, West Sumatra, Jambi and South Sumatra encompassing 840 kms of the “Jalan Lintas Sumatra” highway) based on Rockfall Hazard Rating Systems (RHRS) method; (ii) developing alternatives to stabilize slope hazards, and (iii) selecting appropriate slopes stabilization techniques based on both proactive approach and value engineering one. Based on the Rockfall Hazard Rating Systems (RHRS) method, it was identified 109 steep slopes prone to failure within this highway section. Approximately, 15 slopes were identified as potential high-risk slopes (RHRS scores were calculated >200 points). Based on the proactive approach, seven riskiest slopes ware identified. The preferred stabilization alternatives to remedy most of these slopes are suggested as follow; either (i) a combination of retaining wall and drainage, or (ii) gabion structure and drainage. However, different approaches may yield different results, there are at least 2 main consideration in prioritizing slope stabilization; (i) based on the riskiest slopes, and(ii) the least expensive stabilization alternatives.
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机译：本文的目标是： （i）根据落石危险等级系统（RHRS）方法，确定危险斜坡（苏门答腊的4个省内，包括廖内，西苏门答腊，詹比和南苏门答腊省，涵盖“ Jalan Lintas苏门答腊”高速公路840公里）。 （ii）拟定其他方法，以稳定斜坡危险；及（iii）基于前瞻性方法和价值工程之一，选择适当的斜坡稳定技术。根据Rockfall危险等级系统（RHRS）的方法，在该公路段内确定了109个易于失效的陡坡。大约有15个坡度被确定为潜在的高风险坡度（计算的RHRS得分> 200分）。基于积极的方法，确定了七个风险最高的斜坡。建议采用补救以下大多数斜坡的首选稳定方案： （i）挡土墙和排水系统的结合，或（ii）石笼结构和排水系统。但是，不同的方法可能会产生不同的结果，在优先考虑坡度稳定时至少要考虑两个主要因素； （i）基于风险最高的坡度，和（ii）最便宜的稳定方案。
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